well, you've asked a lot!

1. just send support@dnnsoft.com an email.  I'm sure Suzanne will send you a link to the trial version of the booking tools. I don't know why she doesn't have it listed on the download page.

2. we are finishing up on a property leasing site that allows you to book properties for a certain amount of time.  If you want it to be just a gallery, there are options already in Catalook to hide the price, quantity box and cart button.  it turns Catalook into just what you want.

3. to use other external carts, you would use the URL entry to put your code into so that it sends the visitor to the external cart with the product.  As far a returning an answer, no.

4. once you get used to configuring Catalook (nobody really does get used to it), you will find you can add multiple images in a couple of different ways.  you can create a media gallery for example.  Just look under the product configurator.  You will find the media section in the top row.